diff --git a/src/pEpmodule.cc b/src/pEpmodule.cc
index a644028..2479cb6 100644
--- a/src/pEpmodule.cc
+++ b/src/pEpmodule.cc
@@ -4,6 +4,7 @@
 #include <sstream>
 #include "basic_api.hh"
 #include "message_api.hh"
+#include "sync_mixin.hh"
 
 namespace pEp {
     namespace PythonAdapter {
@@ -193,6 +194,10 @@ BOOST_PYTHON_MODULE(pEp)
     def("encrypt_message", &encrypt_message, "encrypt message in memory");
     def("decrypt_message", &decrypt_message, "decrypt message in memory");
 
+    // key sync API
+
+    auto sync_mixin_class = class_<SyncMixIn>("SyncMixIn", "p≡p Sync MixIn");
+
     // init() and release()
 
     PyModuleDef * _def = PyModule_GetDef(scope().ptr());